Pulverizing-mill.



" PATENTED Nov. 6, 1906.

No. 835,104. y J. H. BLSPASS.

PULVERIZING- MILL. APPLIUATION FIILED JANl 29 1903 v 4 SHEETS-SHEET 2.

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No. 835,104. PATBNTED NOV. `6, 1906. y

J. H. BLSPASS. l

PULVERIZING MILL.

APPLICATION FILED Inma. 190s.

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' shown on a larger scale than in Fig. 3. Fig.

i "UNITED 'sTATns PATENT VfoFFIoE.

y JOHN H. ELSPASS, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO THE ELSPASS ROLLER QUARTZ MILL 'OF PUEBLO, COLORADO.

PuLvERlzl ANDMANUFACTURING COMPANY,

NG-MILLIl Application filed January 29,

Specication of Letters Patent.

T o all whom it may concern: Be it known that I, JOHN H. ELsPAss, a

sidin at Los Angeles, in the county of'Los Ange es and State of California, have invented certain new and useful Improvements in Pulverizing-Mills; andI do declare the following to be a full, clear, and exact descri tion of the invention, such as will enab e others skilled the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon,` which form a part of this specification.

My invention relates to improvements in pulverizi'ng-mills, my obi' ect being to roduce a construction of the ro ler class which shall effectually perform the ulverizing function.

The subject-matter of) Patent N o. 775,130, dated November 15, 1904, having been dithe ap lication is now limited, so far as-its novel eatures are concerned, to the mortarcenterin means, consisting of two rings, one mounte on the stationary framework and the other Vo'n the rotary mortar, said rings having inclined opposing faces engaging 1n thesurface of a r1 ht cone concentric with the mortar-axis. he general construction* of the entire machine will, however, bei briefly described in order that the said novel features may be fully understood.

Referring to the drawings, Figure 1 is a vertical longitudinal section taken through a v mill equipped with my improvements. Fig. 2 is a top or plan view of the same. Fig. 3 isl` a fragmentary vertical section taken through e parts being shown on a'scale somewhat larger than in Fig. 2. Fig. 4 is a section taken through the mortar and the: driving-gear of the operating-shaft. Fi 5 is a perspective detailed view of the p ow 6' is a sectional view illustrating a modified form of construction. Fig. 7 is a fragmenplow in place.l Fig. 8 is a to view illustratmg the upper extremities o the four inner posts shown` in detail. Fig. 9is a detail view-ofonebfthe inner posts. Fig. 10 is al i fragmentary erspective view-of the machine,

illustrating t tion.-

The same reference characters indicate the same parts in all the views.

Let thenumeral 5 designate a suitable bed e mortar-centering construcupon which are mounted two sets of inclined posts, one set being inner posts (designated 6) and the other set being outer posts, (designated 7.) As shown in the drawings, there are four posts of each set, the structure shown being a mill having four pulverizin rolls. Of course in a mill having more relis or rollers there would be two additional posts for each roller addedthat is to say, one inner postand oneouter post, since each roller requires a air of posts.- The inner posts are inclined) or lean toward each other as they extend upwardly from the bedplate. These posts are bifurcated or slotted and are connected intermediate their extremities by a plate 8, this plate and the four posts thus constituting an integral casting. he four osts 6 are each open from the to downwardly to the late 8, where a web-1s located connecting `-t ey two members. Below the plate 8 each ost is also members being sprea apart or wi ened to kstraddl'e the inner j ournal-box 901' a shaft 10, upon which a bevel-faced or cone--shaped mortar-supporting roller 12 is mounted and made fast. The bevel or conical shape of each mortar-supporting roller is such as to `give the roller a perfect rolling contact on the track or part of the mortar-bottom which the roller engages. The outer extremity of this shaft 10 is journaled in a box 13, somewhat more elevated than the box 9, whereby the shaft is inclined downwardly from its outer extremity andv the weight of the mortar bearing on the bevel-faced roller is distributed on the shaft to better advantage and the injurious results ordinarily incident to the outward thrust of the mortar are neutral'- ized and overcome. Hence the advantage of theinclined axis over the horizontal axis for these supporting-rollers. vThe under sursuitable number properly distributed to give ofen, the i the traveling mortar the desired or necessary support. The journal-box 9 is closed at its inner extremity to hold the lubricating material.

The mortar is rotated by a bevelear 15, which meshes with a gear 14a, forme on the under surface of the mortar. This gear 15 is fast on a shaft 16, (see Fig. 4,) journaled in suitable boxes 17, and is provided with suitable fast and loose pulleys 18 and 19,whereby power may be transmitted to the shaft from any suitable motor.

The upper surface of the mortar is equipped with a steel die 20, whose face is inclined inwardly-that is to say, its outer edge is highest and its surface is gradually inclined downwardly toward its inner edge. The object of this inclination of the pulverizing-face of the die is to overcome the tendency of the material acted on by the centrifugal force of the machine to accumulate or become thickest at the outer edge or circumference of the die and cause the pulverizing-rollers to wear unevenly. The pulverizing rolls or rollers occupy an inclined position to fit the inclined face of the mortar-die. These rollers are fast on shafts 22, whose extremities are ournaled in boxes 23, slidably mounted in the posts. The posts 7, as well as the posts 6, are bifurcated or open to receive the boxes 23 of the roll-shafts. The outer posts 7 are connected by Webs 7 a, intermediate their extremities. Each shaft 22 occupies an inclined position, its outer extremity being highest. The journal-boxes 23 are engaged from above by coilsprings 24, the bifurcated post members forming housings for the springs.

Each pair of posts 6 and 7 is provided with a cross-head 25, whose extremities are slidable in the post and bear against the upper extremities of the springs. These cross-heads are adjustable from above by screw-pressure. Thereby the springs 24 are made to bear on the boxes with sufficient tension to give the rolls 21 the desired pressure on the die, or rather on the material lying on the die, for pulverizing purposes. In the preferred form of construction shown in Fig. 2 a centrallylocated spider-shaped device 26 is slidably mounted in the upper portion of the four posts 6 and is provided with four arms whose outer extremities engage the respective crossheads 25, each of which is provided with a central semispherical recess which is engaged by a depending projection 26a, of counterpart shape, formed on the spider-arm. The function of this spider is to apply an equal pressure to all the cross-heads, and therefore it may be termed a pressure-equalizing device, whereby the tension of the springs acting on the boxes of the roll-shafts is made equal and uniform.

A central vertical shaft 27 is made fast at its lower extremity to the plate 8, connecting and formed integral with the four posts 6, as heretofore explained. This shaft 27 asses upwardly through an opening formed 1n the center of the spider 26 and protrudes above the same, its upper portion being threaded to receive a tension nut 2S, provided with a hand-wheel29. This nut is arranged to bear against the spider 26 from above, and its adjustment determines the tension of the springs 24 through the instrumentality ofthe pressure-equalizing spider and the spring-enga ing cross-heads.

t their upper extremities the posts 6 are close together and are open, as above stated, to receive the spider. At each corner the upper extremities of two post members form a right angle, and those two members are connected by a horizontal flange or web 6u. The posts 6 and 7 are connected and securely braced at the top by four triangular members or brace-bars 30, which are bolted to thc post members, the arrangement being such that each of these braces engages a flange of two outer posts and a connecting cornerflange 6a of two inner posts.

The inner edge of the mortar is surrounded by an upwardly-projecting flange 37, which is inwardly inclined to catch any adhering material which may fall from the rolls being carried upwardly from the mortar.

The outer edge of the plate 8 and the inner edge of the mortar are provided with engaging rings 3S and 39, whereby the mortar is properly centered and made to rotate in a true circle. These rings have inclined opposing faces engaging each other in the surface of a right cone concentric with the axis of the mortar.

As shown in the drawin s, the ring 3S has a ange 38a overlapping t ie ring 39. This flange prevents the entrance of dust orother foreign matter to the engaging surfaces of the rings.

Having thus described my invention, what I claim is- 1. The combination in a pulverizing-mill, of an outer and inner series of posts, an annular revoluble mortar located between said series of posts, rollers supporting the same, means for rotating the mortar, and annular mortar-centering rings carried respectively by the mortar and the inner series of posts, said rings having opposing edges in the surface of a right cone concentric with the mortar-axis.

2. The combination in a pulverizing-mill, of outer and inner series of posts, an annular revoluble mortar located between said series of posts, said mortar provided on its under surface with a ring gear, a driving-gear operating in connection therewith, means for operating said driving-gear, rollers upon which TOO IIO

l said mortar revolves, said mortar provided l With an inwardly-extendlng mortar-centersaid ring provided with' an inner ing rin'gfZ face inc ined With respect to the mortar-ams, and an annular flange extendin ouffI from said inner series of posts and provided With a bearing-face o positely inclined With respect to said inclined face of said mortar-centering ring, and against which the-'same is adapted to bear. v

In testimonywhereof I aix my signature in presence of tWo Witnesses.

JOHN H. ELSPASS. Witnesses:

A. J. OBRIEN, DENA NELSON. 

